Improved scaffold-bracket



waited gieten @anni @with Letters Patent No. 98,559, dated January 4, 1870.

IMPROVE!) SCAFFOLD-BRACKET.

The Schedule referred to in these Letters Patent and making part of the same.

To all whom .it may concern:

- support the scaffold-braces, without the driving of nails through the shingles.

It consists of a pairof clamp-jaws, an eccentric or cam-shaped,clamping-dog or lever, and a spring, so arrangedthat the jaws may be readily and securely attached to the end of a .shingle already nailed ou, by raising the end of the said shingle,inserting it between the jaws; and turning the clamp-dog lto force the jaws together.

The spring is 4used to force the jaws apart, when the dog is turned down to release them, and to hold the cam-(login place.

Figure 1 is a side elevation of myimproved clamp, showing the-application to'theroof, which is shown in dotted lines. Y

` Figure 2 is an end View of the clamp.

Similar letters of reference indicate corresponding parts.

A is one of the jaws, and B, the other. They are designed to be made of metal, and shaped at the clamping-ends so as to take a iirmhold of a dat shingle.

Tile one, A, is provided with plates G, near the clamping-ends, for the support of the journals D of the eccentric or cam-dog E.

At the other end it is bent up at a. right angle abd slotted at F, for the reception of the end of the jaw B, which is provided with shoulders, at G, to bear against the edges of the plates G, for holding the said end in the slot. The plates C are provided with .curved slots H, leading from one edge to the holes, for the bearings of the journals D of the cam-dog, so that the latter may be put in its place readily, the jaw A and'plates O being formed together in one piece, by\ casting.

The slot F is also formed in ,casting the jaw A, and the whole is thus constructed without yany expense for iitting, except in the application of' the spiral spring I, placed between the jawsand connected to one or both, as prel'erred. This spring serves the double purpose ofope against the end of the dog, so that the latter is always held in its bearings in the plates O, and prevented from falling out.

The construction is, in this way, rendered exceed- Witnesses.` 4

L. E. WHITE, M. B.ALLEN.

ing the jaws and of holding the jaw B` 

